5999681 has 2 divisors, whose sum is σ = 5999682. Its totient is φ = 5999680.

The previous prime is 5999677. The next prime is 5999699. The reversal of 5999681 is 1869995.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5017600 + 982081 = 2240^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 5999681 - 2² = 5999677 is a prime.

It is a super-2 number, since 2×5999681² = 71992344203522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5999881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2999840 + 2999841.

It is an arithmetic number, because the mean of its divisors is an integer number (2999841).

Almost surely, 2^5999681 is an apocalyptic number.

It is an amenable number.

5999681 is a deficient number, since it is larger than the sum of its proper divisors (1).

5999681 is an equidigital number, since it uses as much as digits as its factorization.

5999681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 47.

The square root of 5999681 is about 2449.4246263153. The cubic root of 5999681 is about 181.7088388846.

The spelling of 5999681 in words is "five million, nine hundred ninety-nine thousand, six hundred eighty-one".